9/16/2023 0 Comments Lansweeper print nightmare![]() ![]() "Leaked print spooler exploit lets Windows users remotely execute code as system on your domain controller". ^ a b c d Corfield, Gareth (30 June 2021).Archived from the original on 10 July 2021. "Microsoft issues urgent security warning: Update your PC immediately". However, several copies have since appeared online. Apparently published in error, or as a result of a miscommunication between the researchers and Microsoft, the proof of concept was deleted shortly after. The organization which discovered the vulnerability, Sangfor, published a proof of concept in a public GitHub repository. After the patch is applied, only administrators account on Windows print server, will be able to install printer drivers, as part of the vulnerability related to the ability of non-administrators to install printer drivers on the system, such as shared printers on system without sharing password protection. Researchers have noted that the vulnerability has not been fully addressed by the patches. The patches resulted in some printers ceasing to function. Due to its severity, Microsoft released patches for Windows 7 and Windows Server 2012, despite being out of their mainstream support period. On July 6, 2021, Microsoft started releasing out-of-band (unscheduled) patches attempting to address the vulnerability. A third vulnerability (CVE-2021-34481) was announced July 15, 2021, and upgraded to remote code execution by Microsoft in August. There were two variants, one permitting remote code execution (CVE-2021-34527), and the other leading to privilege escalation (CVE-2021-1675). The vulnerability occurred within the print spooler service. PrintNightmare was a critical security vulnerability affecting the Microsoft Windows operating system. Security vulnerability in Microsoft Windows PrintNightmare CVE identifier(s) ![]()
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